Medium severity · published Apr 20, 2026
CVE-2026-6601
Lagom WHMCS Template Datatables resource consumption
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
A vulnerability has been found in Lagom WHMCS Template up to 2.4.2. This impacts an unknown function of the component Datatables. The manipulation leads to resource consumption. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WT
WHMCS Template · Lagom
2.4.0; 2.4.1; 2.4.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6601
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6601
github.com
https://github.com/devsamuelsantiago/lagom-whmcs-dos-poc
vuldb.com
https://vuldb.com/submit/791943
vuldb.com
https://vuldb.com/vuln/358236
vuldb.com
https://vuldb.com/vuln/358236/cti
More from WHMCS Template
3.5
CVE-2026-4239
Lagom WHMCS Template Datatables prototype pollution
